823799 has 2 divisors, whose sum is σ = 823800. Its totient is φ = 823798.

The previous prime is 823789. The next prime is 823819. The reversal of 823799 is 997328.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823799 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411899 + 411900.

It is an arithmetic number, because the mean of its divisors is an integer number (411900).

2⁸²³⁷⁹⁹ is an apocalyptic number.

823799 is a deficient number, since it is larger than the sum of its proper divisors (1).

823799 is an equidigital number, since it uses as much as digits as its factorization.

823799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 823799 is about 907.6337367022. The cubic root of 823799 is about 93.7433393786.

The spelling of 823799 in words is "eight hundred twenty-three thousand, seven hundred ninety-nine".